Button from Base Layer SHowing up On Other Layers EVen though Hidden?

I have a question about this scenario. I am new to eLearning design and to Storyline360. I have read in several places that the built-in states for hover, selected, and visited are not reliable (it is said they will eventually break if you use them). Supposedly, only the hidden and and disabled built-in states are reliable. Is this true?

I tried to create my own custom hover, selected and visited states (I called them "HoverState", "SelectedState", and "VisitedState") for a slide I created. I set up triggers to fire when each of 3 buttons are selected to show a layer of additional information. Everything works beautifully...EXCEPT the clickable button from the base layer still appears on the layer (no matter what I do to try to get it to go away). I also realize I may have overlooked something since I am new to Storyline.

If I use the built-in states of hover, selected, and visted instead...everything works perfectly. Of course I want everything to work perfectly, especially since this is my first course, and a compliance course (that I will be offering to individuals who must take the course to earn continuing education credits). Because I will be offering the course to learners who need it to maintain a license, and I am an approved provider of education for the governing body over those licensees, I cannot afford for things to "break" after learners start taking the  course.

Is it safe for me to use those built-in states?? Thank you!